Sentence Examples


  • This ocean, already diminished in area, retreated after Oligocene times from the Iranian plateau, Turkestan, Asia Minor and the region of the north-west Alps.
  • Fossil insects referable to the order have been found in Tertiary beds as old as the White River Oligocene of North America, and the Baltic amber, but nothing is known as to the previous history of the group.
  • Fossil remains of members of this family have also been found in Europe in strata of the Oligocene period.
  • From the Oligocene deposits of France and southern England have been obtained numerous remains of opossums referable to the American family Didelphyidae.
  • In this valley were laid down, either in Eocene or Oligocene times, a great series of lake beds and thick accumulations of brown coal.

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